If playing with sufficiently harsh settings, one can find that they have been...rather outpaced by the advancement of the native life. This is especially true with certain mod environments, such as a grouping of NauvisDay, Natural Evolution, and Rampant.

Biters should present a serious threat, especially when one does not design their factory with good defence strategies in mind. But noone wants to end up 60 hours into a save and realize that they need blue science tech just to defend their factory against the ceaseless attack waves, while they are currently still struggling to automate ammo production. Noone wants to realize that to get their first oil patch, they need to clear a nest with 19 spawners and 8 big worms, while the best weaponry they have available are un-upgraded grenades.

With Loss Prevention, those scenarios will not happen - the enemy evolution will be kept in check by your own progression - or lack thereof - through the tech tree. Unlike other mods, this does not change how evolution generally behaves - time, pollution, and spawner destruction still do their thing - but it does prevent it from running to a point of unrecoverability.